Home / 21,830.64-30,126.48-12,399.26

Finding the Fourth Proportional to 21,830.64, 30,126.48 and 12,399.26

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Solution

The fourth proportional to 21,830.64, 30,126.48 and 12,399.26 is: 17,111.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,830.64 : 30,126.48 = 12,399.26 : x
  2. Step 2: Convert to fraction form
    21,830.64/30,126.48 = 12,399.26/x
  3. Step 3: Cross multiply
    21,830.64x = 30,126.48 × 12,399.26
  4. Step 4: Simplify right side
    21,830.64x = 373,546,058.40
  5. Step 5: Solve for x
    x = 373,546,058.40/21,830.64
  6. Step 6: Final answer
    x = 17,111.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.